I think it's a fun addition of play for my kitty. She rushes up to the top when she's energetic. I've read reviews about it bending out of alignment. Maybe that is the case if you have a really big cat or the reviewer didn't take the time to set it up the best possible way. I recommend to avoid it bending, to tighten as much as you can each level of posts, and then if you need to cut the plastic at the top to push down as much as you can into the posts before deciding where to cut the plastic tube. That way it is very secure when sliding the top piece against the ceiling. You'll most likely need to cut the plastic tube. Have a hacksaw handy to make it a clean, easy cut. I'm in an apartment and it came with two tubes but I only needed one.
